I haven't seen a copy of the first edition for quite a while, but I think the current hardback by Marcus Aurelius Press is identical apart from a new preface mentioning the hostility of Jewish Kabbalistic scholars to the Tarot.
The pictures for the Ace of Disks and Cups are still the wrong way around in the latest edition.
I have one minor quibble with the book that has nothing to do with the different editions. In the Qabalistic Tarot, Wang compares the Golden Dawn, Thoth (Knight), Rider-Waite, and Marseille Kings as if they were all the same. (The same thing happens with the Knights/Princes)
In the Golden Dawn Book T there is an instruction for using a "standard" deck containing King, Queen, Knight, and Page court cards and how they should be ordered to correspond to the elements. Kings in a standard deck are the Princes of the Golden Dawn/Thoth deck. Knights in a standard deck are the Kings of the Golden Dawn Tarot. Crowley left the name unchanged.
It's only a small problem and in no way does it detract from the usefulness of the book. But it's nice to know.